Incorrect select(len()) with some select orderings

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Checks

• I have checked that this issue has not already been reported.
• I have confirmed this bug exists on the latest version of Polars.

Reproducible example

q = pl.LazyFrame({"a": range(3)}).select(
    pl.first("a"),
    pl.col("a").alias("b"),
)

assert q.select(pl.len()).collect().item() == 3

# AssertionError: 1 == 3

Log output

No response

Issue description

Incorrect len()

Expected behavior

The non-scalar should be projected to give a len of 3

Installed versions

1.17.0